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National Solar Radiation Database (NSRDB)

Published by National Renewable Energy Laboratory | Department of Energy | Metadata Last Checked: August 03, 2025 | Last Modified: 2023-01-11T22:18:01.983Z
The NSRDB is a serially complete collection of hourly and half-hourly values of the three most common measurements of solar radiation—global horizontal, direct normal, and diffuse horizontal irradiance—and meteorological data. The current NSRDB is modeled using multi-channel measurements from geostationary satellites. The older versions of the NSRDB were modeled using cloud and weather information primarily collected at airports. A sufficient number of locations and temporal and spatial scales were used to represent regional solar radiation climates accurately.

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